Comet 141P/Machholz is forecast to reach the brightest point in its 1988 apparition on 16 December. At that time, it will lie at a distance of 0.91 AU from the Sun, and at a distance of 0.15 AU from the Earth.
From Cambridge on 16 December it will not be readily observable since it will lie so far south that it will never rise more than 8° above the horizon.
The events that comprise the 1988–1989 apparition of 141P/Machholz are as follows:
| Date | Event |
| 20 Nov 1988 | Comet 141P/Machholz passes perihelion |
| 16 Dec 1988 | Comet 141P/Machholz reaches peak brightness |
The table below lists the times when 141P/Machholz will be visible from Cambridge day-by-day through its apparition:
| Date | Constellation | Comet visibility |
| 25 Nov 1988 | Aquila | Visible from 17:27 until 17:55 Highest at 17:27, 26° above SW horizon |
| 27 Nov 1988 | Sagittarius | Visible from 17:27 until 17:47 Highest at 17:27, 25° above SW horizon |
| 29 Nov 1988 | Sagittarius | Visible from 17:26 until 17:38 Highest at 17:26, 23° above SW horizon |
| 01 Dec 1988 | Sagittarius | Visible from 17:26 until 17:27 Highest at 17:26, 22° above SW horizon |
| 03 Dec 1988 | Sagittarius | Not observable |
| 05 Dec 1988 | Capricornus | Not observable |
| 07 Dec 1988 | Capricornus | Not observable |
| 09 Dec 1988 | Capricornus | Not observable |
| 11 Dec 1988 | Microscopium | Not observable |
| 13 Dec 1988 | Microscopium | Not observable |
| 15 Dec 1988 | Piscis Austrinus | Not observable |
| 17 Dec 1988 | Grus | Not observable |
| 19 Dec 1988 | Grus | Not observable |
| 21 Dec 1988 | Phoenix | Not observable |
| 23 Dec 1988 | Phoenix | Not observable |
| 25 Dec 1988 | Phoenix | Not observable |
| 27 Dec 1988 | Eridanus | Not observable |
| 29 Dec 1988 | Horologium | Not observable |
| 31 Dec 1988 | Horologium | Not observable |
| 02 Jan 1989 | Caelum | Not observable |
| 04 Jan 1989 | Caelum | Not observable |
A more detailed table of 141P/Machholz's position on each night is available here. A diagram of the orbit of 141P/Machholz is available here.
Finder chart
The chart below shows the path of 141P/Machholz over the course of its apparition, as calculated from the orbital elements published by the Minor Planet Center (MPC). It is available for download, either on dark background, in PNG, PDF or SVG formats, or on a light background, in PNG, PDF or SVG formats. It was produced using StarCharter.
Comet brightnesses
Comets are intrinsically highly unpredictable objects, since their brightness depends on the scattering of sunlight from dust particles in the comet's coma and tail. This dust is continually streaming away from the comet's nucleus, and its density at any particular time is governed by the rate of sublimation of the ice in the comet's nucleus, as it is heated by the Sun's rays. It also depends on the amount of dust that is mixed in with that ice. This is very difficult to predict in advance, and can be highly variable even between successive apparitions of the same comet.
In consequence, while the future positions of comets are usually known with a high degree of confidence, their future brightnesses are not. For most comets, we do not publish any magnitude estimates at all. For the few comets where we do make estimates, we generally prefer the BAA's magnitude parameters to those published by the Minor Planet Center, since they are typically updated more often.
No estimate for the brightness of comet 141P/Machholz is currently available.
The comet's position on 16 December 1988 will be:
| Object | Right Ascension | Declination | Constellation | Magnitude |
| Comet 141P/Machholz | 22h02m00s | 39°32'S | Grus | 6.9 |
The coordinates are given in J2000.0.
The sky on 27 Sep 2024
| The sky on 27 September 2024 | ||||||||||||||||||||||||||||||||||
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18% 24 days old |
All times shown in EDT.
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Source
This event was automatically generated on the basis of orbital elements published by the Minor Planet Center (MPC) , and is updated whenever new elements become available. It was last updated on 16 Sep 2024.
Image credit
© Andy Roberts 1997. Pictured comet is C/1995 O1 Hale-Bopp.